Jim Macklin wrote:
It may have been a test flight, checking avionics,
auto-pilot, etc. The crew may also have been in training.
Maybe they just needed a few more minutes to complete some
flight time experience requirement and a go-around was
better than and would use less time than another flight
cycle.

I've heard of 737's 'in the pattern' at Castle AFB.
On that runway, they can probably do a couple of Touch
and goes on each pass.

gerald